Air-water interface methane and carbon dioxide on-line monitoring system and method thereof

Abstract

The invention relates to an air-water interface methane and carbon dioxide on-line monitoring system, which solves the disadvantage that in the prior art, methane concentrations in different systems only can be sampled in a laboratory for detection, and the influence of natural gas hydrate decomposition on circumference environment under different angles can be realized. The on-line monitoring system comprises a water pump, an air-water separator, a drying device and a laser detector; a water pump is arranged in the water containing methane with dissolvability and carbon dioxide, a sealing tank is used for connecting with the water pump and the surficial air-water separator, the gas generated after separation is collected through the drying device, and detection is carried out through the laser detector. The invention also provides an air-water interface methane and carbon dioxide on-line monitoring method.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate research, in particular to an online monitoring system and method for methane and carbon dioxide at the water-air interface. Background technique [0002] Natural gas hydrate (Natural Gas Hydrate) is an ice-like, non-stoichiometric, clathrate solid compound composed of water and small guest gas molecules at low temperature and high pressure, commonly known as "combustible ice", because the gas component in it is mainly methane, so Also known as methane hydrate (Methane Hydrate). Natural gas hydrate has a high energy density. Under ideal conditions, 1m 3 The natural gas hydrate can be decomposed into 164m 3 methane gas and 0.8m 3 of water. The natural gas hydrate reserves on the earth are very rich, and the natural gas hydrates are widely distributed in permafrost regions, deep-sea sediments and deep lake sediments at the edge of the continental shelf, and the carbon storage in the ...

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Problems solved by technology

(3) Global warming leads to an increase in seawater temperature, resulting in the decomposition of seabed gas hydrate

Therefore, the present invention proposes an on-line monitoring method of methane / carbon dioxide at the water-air interface, which solves the disadvantages of the past that the methane concentration in different systems can only be sampled and returned to the laboratory for detection, thereby realizing real-time monitoring of natural gas hydrate decomposition from different angles. The impact of the surrounding environment

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